Bung sput



I Sept. 7, 1943.

C. C. VOGLES ONG BUNG-SPUT Filed March 28, 1941 E- 'IEi E INVENTOR C/gc/e C Vang/650mg going, will be set forth in the following description of the preferred form of the invention which is illustrated in the drawing accompanying and forming part of the specification. It is to be understood, however, that variations in the showing'made by the said drawing and description may be adopted within the scope of the invention as set forth inthe claim:

Referring to said drawing: Figure 1 is"'a longitudinal-sectional view of 'a sput constructed inaccordancewit'h my invention and showing same ready for insertion in a container Wall. 7

Figure 2 is a view similar to Figure 1 but showingthe sput operatively attached to the container wall and with a plug and cap applied thereto.

Figures 3 to .7 inclusive are longitudinal sectional views of the sput at different stages in the formation thereof.

As previously explained, I form the sputof sheet metal, and 'I find that stock of a gauge which will .permit of securing'the sput to the container wall by a lock-seam joint, is sufficiently flexible to make practical the utilization exclusively of die-stamping and "spinningoperations' for forming the ga'sket'seats and cap-anchoring means on the sput. By use of the sheettmetalj not only canI thus DrQVidefor ajlock-seam con-. .nection and permit the manipulation of the. metal to provide for the anchoring and seat arrangement of my invention, but Ican-utilizefja certain basicform of sput design to permit application ofthe die and spinning means to the sput structure to producemost effective operation and results. The design referred to is of the type comprising spaced inner and outer concentric tubular portions joinedtoge ther at the top and arranged for' attachment to the container by a look; seam J'ointeffected between the bottom of the outer portion and thewall portion ure 2.'-'

In this type of sput as heretofore designed, the seat for engagementv of the plug gasket, was directly upon the outer surface of the connecting part between the inner and outer portions,

and in this manner the head of the plug as well 'as the plug gasket will protrude from the sput and .preventthe application to the sput of the cap as previously explained. In the sput as I constructit, the threaded part of portion 3. in-

eludes only what may becalled the lower part of such 'p'ortion sothat there is left an unthreaded part l4 contiguous with the intermediate portion 6. i The threaded part and the unthreaded; part are in offset relation,- with the threaded part of of the container surrounding the; opening in" which the sput isinsertedv In this designthe inner portion ofthe split is threaded for the reception of the plug and as heretofore made the' joined end of the portions provides a seat for. whenthe plug engagement. by the plug gasket. is screwed intothe sput. j

By reference to the drawing it that Ihave adopted in general the design above described, and as here shownthe sput comprises a one-pieoe sheet metal member 2 formed with inner and outer tubular portions 3 and 4 arranged in spaced and. concentricirelation and joined at the top by an intermediate portion .6.

On'the inner surfaceofithe portion .3 are provided screw-threads :1 designed for engagement will be seen with -corresponding threads of the plug 9 used with the sput. Preferably, the portion '3.tapers slightly inwardly from the top to the bottom but' the threads I are out cylindrically so as to leave theupper threads foreshortened and. thereby permit theplug to more readily accommodate itself for-proper cooperation with the sput upon insertion of the. plug therein. This feature is, quite desirable from a practical standpoint, since in many instances plugs of different makes will be applied to the sput and somemay not exactly atits free extremity with a locking flange II which isdesigned for cooperation with a com-' plemntary flange 62 of the wall [3 of the container in which the sput, is inserted. The portion. 4 extends outwardly from' the top toithe, bottom. and to a'idegree and of acu'rvature" lfheouter portion a of themmberfz' is formed,

smaller diameter whereby a seat l6 for the plug J.

gasket is provided at the juncture of said parts.

The unthreaded part l4 is long enoughflto enable the plug gasket and the'plug head to be completely accommodated-j therein when the plug" is screwed. home in, the p lug,; it beingnoted in this connectiori that the outside diameter .of then] -p1ug head,.as wellas; that of the gasket before i n the smaller diameter compression, is less t of the part M.

The cap with which sputis particularly l' adapted for use is illustratedin. Figure 2 This cap is of thetype' whichfis marketed under.the; trade mark .U -Bre ssit jand'as here show, cornprises a. sheeti meta'l bodylportion 'l havinga.

slitted peripheral extension which is bent downward'to providea pluralityof resilient ,tongues I8;

The free ends of. the tongues are bent inwardly to form 'detents 28 which are designed to'clutch' some part of thessput so asto. anchor the cap'tofl ,V the sput. Within thecapfandco'extensive with the body is a circular gasket 28 which as will be seen from the drawings, overlies and .rests upon the intermediate portion 6, of the, sput. I It will ,thus beclear that, the sput provides a seat for the 'cap gasket asfiwell as a s'eatforthe plug sk f Y For affording a the sput, and as. here shown, such groove is formed in theouter portion 4 about midway betweenthe portion. 6 and the flanged end. Since there is, considerable space between the inner and outer portionsat the point of location of the groove, the latter may be formed by. Pressing a part 2! of the outer portion inwardly.

forming the groove, there will be provided along the upper. edgethereof a shoulder 22:on which] the detents may catch to :hold the cap tottheo sput.

The body in this type of cap shown is designed I I to, operate as a clicker disc, that is it mayv be flexed toeitherconvex or concave form at the top of the sput. When the body isflexed in- .WardIythetongues becomeextended so that the cap may be inserted on or released from the sput,'but when the'body is flexed outwardlythe tongues become contracted; whereby the detents may enter the groove"and anchor the cap in position. I, Whentheoap is in locked position on he sput, release -of the detents is obtained by means of engagement of the I: detents IS, an annular groove I9'is provided in g By t u simply depressing the body at the center, and conversely to produce the upward flexure of the body when the cap is on the sput, pressure is exerted inwardly upon the peripheral portion of the body with the portion 6 serving as a fulcrum.v Since the plug is hollow at the top and will seat completely within the sput, and likewise since the cap body may teeter freely on the portion 6, the proper operation and functioning of this type of cap is readily permitted. As will be clear, when the detents are moved into the groove, the cap gasket will be firmly pressed against the portion 6, whereby an effective seal will be provided independentof the plug seal. It is important to note that since the sput portions 4 and 6 are structurally formed free and independent of the container or the plug receiving portion of the sput, such portions may be shaped or worked without interfering with the functions thereof or of the rest of the sput or the attachment of the sput with the container. For instance, the groove may be provided by indenting a middle section of portion 4, and likewise the oifset between the threaded and unthreaded parts of the inner portion is effected without affecting the relationship between such parts and any part of the sput or container. 7

To form the sput, a blank disc of appropriate size is cut from sheet metal of the required gauge, and such disc is then deformed in a suitable die to provide an inverted bowl-like portion 23 with a rim portion 24, as shown in Figure 3.

The next step in the process is to fold back the rim portion 24 so that it will lie opposite the sides of the portion 23. This is illustrated in Figure 4. Thereafter, as indicated in Figure 5, an opening 25 is punched in the base of theportion 23, and the rest of the base depressed, as-

shown in Figures 5 and 6 to form by one operation the inner member 3 with its parts of different diameters including both seats 6 and I6. This simple and effective forming operation is made possible by the fact thata female die may v be inserted in the bowl portion and allowed to remain therein for coaction with the male ,die for the entire operation and then readily removed when required.

After the last mentioned operation the portion 24 is folded inwardly still further, as shown in Figure 6, until the angle thereof isappropriate for effecting the lock-seam joint with the The portion I 4 may be tapped either before or after the grooving operation.

The sput is thus complete and ready for application to the container. In some instances where it is desirable to insure an absolute extraction of all the contents in the container, the

, space between the inner and outermembers of the sput may be filled with some light metal or other filler material. provided by casting the material in place, the grooved portion of the outer member serving to anchor the filler in place. i I claimi In means of the character described, a onepiece sheet metalbung-sput including inner and outer tubular concentric portions having their body portions spaced from each other and joined at one end toprovide thereat a sealing, cap seat, said inner portion comprising an interiorly threaded inwardly tapered part and an upper outwardly offset portion, the latter forming an inner seat for a'gasket, said threaded portion being tapered from the top to the bottombut with the threads cut cylindrically, a slightly tapered closure plug having athreaded portion for engagement with said threaded part and a head arranged for insertion in said other part of said inner portion and to engage said second seat, said plug and sput being so designed and related that when the second seat is operatively engaged by the plug the head of the plug will be Preferably the filler 3| is 

